package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.dto.PasswordEditDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;
import java.util.List;
import java.util.Objects;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        //对前端传来的明文密码进行md5加密处理
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (Objects.equals(employee.getStatus(), StatusConstant.DISABLE)) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    /**
     * 新增员工
     *
     * @param employeeDTO
     */
    public void save(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();

        //对象属性拷贝
        BeanUtils.copyProperties(employeeDTO, employee);

        //设置账户状态, 默认为正常状态, 1代表正常, 0代表锁定
        employee.setStatus(StatusConstant.ENABLE);

        //设置密码, 默认密码为123456
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));

//        //设置当前记录的创建时间和修改时间
//        employee.setCreateTime(LocalDateTime.now());
//        employee.setUpdateTime(LocalDateTime.now());
//
//        //设置当前录入记录人的id和修改人的id
//        employee.setCreateUser(BaseContext.getCurrentId());
//        employee.setUpdateUser(BaseContext.getCurrentId());

        employeeMapper.insert(employee);
    }

    /**
     * 员工分页查询
     *
     * @param employeePageQueryDTO
     * @return
     */
    public PageResult pageQuery(EmployeePageQueryDTO employeePageQueryDTO) {
//        //获取员工总数
//        pageResult.setTotal(employeeMapper.count());
//        //查询当前页码员工信息
//        int page = employeePageQueryDTO.getPage();  //页码
//        int pageSize = employeePageQueryDTO.getPageSize();  //显示记录数
//        int start = (page - 1) * pageSize;  //查询起始索引
//        String name = employeePageQueryDTO.getName();   //模糊查询的员工姓名
//        pageResult.setRecords(employeeMapper.pageQuery(name, start, pageSize));

        //利用PageHelper插件写分页查询  -->  可以自动动态拼接limit条件
        PageHelper.startPage(employeePageQueryDTO.getPage(), employeePageQueryDTO.getPageSize());

        Page<Employee> page = employeeMapper.pageQuery(employeePageQueryDTO);

        long total = page.getTotal();   //获取员工总数
        List<Employee> result = page.getResult();   //获取分页查询结果

        return new PageResult(total, result);
    }

    /**
     * 启用禁用员工账号
     *
     * @param status
     * @param id
     */
    public void startOrStop(Integer status, Long id) {
        //创建一个Employee类来封装请求参数, 实现动态查询
        /*Employee employee = new Employee();
        employee.setStatus(status);
        employee.setId(id);*/

        //创建一个Employee类来封装请求参数, 实现动态查询
        Employee employee = Employee.builder()
                .status(status)
                .id(id)
                .build();

//        //更新修改时间
//        employee.setUpdateTime(LocalDateTime.now());
//        //设置当前记录修改人的id
//        employee.setUpdateUser(BaseContext.getCurrentId());

        employeeMapper.update(employee);
    }

    /**
     * 根据id查询员工
     *
     * @param id
     * @return
     */
    public EmployeeDTO getById(Long id) {
        EmployeeDTO employeeDTO = new EmployeeDTO();
        Employee employee = employeeMapper.getById(id);
        BeanUtils.copyProperties(employee, employeeDTO);

        return employeeDTO;
    }

    /**
     * 编辑员工
     *
     * @param employeeDTO
     */
    public void update(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO, employee);    //将employeeDTO对应值拷贝到employee

//        //更新修改时间
//        employee.setUpdateTime(LocalDateTime.now());
//        //设置当前记录修改人的id
//        employee.setUpdateUser(BaseContext.getCurrentId());

        employeeMapper.update(employee);
    }

    /**
     * 修改账号密码
     */
    public void editPassword(PasswordEditDTO passwordEditDTO) {
        //对密码进行MD5加密
        String password = DigestUtils.md5DigestAsHex(passwordEditDTO.getNewPassword().getBytes());
        //创建employee类对属性进行封装
        Employee employee = Employee.builder()
                .id(passwordEditDTO.getEmpId())
                .password(password)
                .build();
        /*employee.setId(passwordEditDTO.getEmpId());
        employee.setPassword(password);*/

        employeeMapper.update(employee);
    }

    /**
     * 检验旧密码是否填写正确
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee checkOldPassword(EmployeeLoginDTO employeeLoginDTO) {
        Employee employee = employeeMapper.getByUsername(employeeLoginDTO.getUsername());

        //密码比对
        //对前端传来的明文密码进行md5加密处理
        String password = DigestUtils.md5DigestAsHex(employeeLoginDTO.getPassword().getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            return null;
        }

        return employee;
    }
}
